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Motor Control
11.2. Turning off Load Compensation
LokSound V4.0
LokSound micro V4.0
You can also switch off load compensation by writing the value 0
in CV 56 („Control Influence").
With load control turned off, the starting voltage in CV 2 should
be increased until the locomotive starts moving at speed step 1
or 2.
11.3. Adapting Load Control Frequency
LokSound V4.0
LokSound micro V4.0
In the LokSound decoders load control works normally with 40
kHz. Sometimes it can be useful to reduce this frequency by half:
• For motors with little power due to high inductivity.
• If suppressors (such as capacitors, chokes, etc.) disturb load con-
trol but cannot be removed (e.g. some older Gützold® locos).
Delete bit 1 in CV 49 in order to set the PWM frequency from 40
KHz to about 20 kHz.
11.4. Dynamic Drive Control: Up and Down the Hill
LokSound V4.0
LokSound micro V4.0
Dynamic Drive Control of your LokSound decoder enables you
to adapt load control, as you may desire. Full control over the
entire speed range (constant speed, if enough power is available)
is not always prototypical. Therefore you can set the degree to
which load control will be effective between 0 (no load control)
and 100% (load compensation over the full range).
At low speeds it is advisable to have 100% load compensation
in order to prevent the locomotive form „getting stuck" or from
„running away" without any load. The impact of load control
should recede with increasing speed in order to have the full „un-
harnessed" power of the motor available when the throttle is fully
open. Thus, the locomotive will respond to certain changes in the
main line such as gradients. The locomotive will run faster down-
hill and become slower climbing the hill.
The desired degree of load control influence is set in CV 56.
It is particularly meaningful to reduce the influence of load control
whenever you run consists. This allows for better driving proper-
ties of all locomotives in the consist.
11.5. Settings for the C-Sinus Motor
LokSound decoders with the 21MTC interface can drive the new
C-Sinus motors indirectly via the circuit board installed in the loco-
motive. The LokSound can generate all necessary signals provided
you readjust certain settings:
Load compensation must be turned off as described in chapter
11.2.
The control electronics of the motor also need a switched logic
voltage provided by the LokSound on output AUX4. AUX4 must
therefore be active while the locomotive is stopped and while it is
moving (in both directions!).
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